List of top Questions asked in CBSE CLASS XII

X Ltd. forfeited 100 shares of 100 each for non-payment of the allotment money of 15 per share (including premium 5). The first and final call of 50 per share was not yet made. The amount that was debited to share capital account was:
There are two statements Assertion (A) and Reason (R):
Assertion (A): Private assets of a partner can also be used for paying off the firm’s debts.
Reason (R): Liability of a partner for acts of the firm is limited.
Choose the correct alternative from the following:
The amount of share capital which a company is authorised to issue by its Memorandum of Association is known as:
Y Ltd. issued 1,000 debentures of Rs 100 each at par, redeemable at a premium of 10 percent. Pass journal entries for issue and redemption.
X Ltd. issued 10,000 equity shares of Rs 10 each at a premium of Rs 2 per share. Amount payable: Rs 4 on application, Rs 5 on allotment (including premium), and Rs 3 on first & final call. All shares were subscribed and money received. Pass journal entries.
From the following details, calculate Cash Flow from Investing Activities: - Purchase of Machinery Rs 1,50,000
- Sale of Land Rs 80,000
- Purchase of Investments Rs 50,000
- Interest received Rs 8,000
Calculate the packing efficiency in a face-centered cubic (FCC) crystal.
Write the IUPAC name of the compound: \[ \text{CH}_3-CH_2-CH(CH_3)-CH_2-CH_2-CH_3 \]
Write balanced chemical equations for the following:
(a) Reaction of white phosphorus with chlorine
(b) Reaction of orthophosphoric acid on heating
Calculate the EMF of the cell:
Zn(s) | Zn\(^{2+}\) (0.1 M) || Cu\(^{2+}\) (1.0 M) | Cu(s)
Given: \( E^\circ_{\text{Zn}^{2+}/\text{Zn}} = -0.76\,V \), \( E^\circ_{\text{Cu}^{2+}/\text{Cu}} = +0.34\,V \)

Match the List-I with List-II:

Match the List-I with List-II for the given isometric projection of combination of solids:

Select the correct option for the given isometric projection of combination of solids.

(i) The axis of pyramid is parallel to H.P. and one of its base edges is perpendicular to H.P.
(ii) A sphere of diameter 70 mm is placed on the top face of a prism.
(iii) The axis of pyramid is parallel to V.P. and one of its base edges is perpendicular to V.P.
(iv) The axis of prism is perpendicular to V.P. and one of its base edges is parallel to H.P.
 

Identify the correct figure which represents the isometric projection of a vertical square prism placed on a horizontal square slab.

The above given top view corresponds to

Select the correct statements for the given figure.
(i) A horizontal pyramid is placed with its axis parallel to both H.P. and V.P.
(ii) The solid has three triangular faces in total.
(iii) A horizontal pyramid is placed with its axis perpendicular to V.P.
(iv) It is an example of polyhedron.

Orthographic projection of a cube is shown as :

Fig. 2 shows the assembly of a SLEEVE AND COTTER JOINT. Disassemble the parts correctly and then draw to scale 1:1 its following views of the following components. Keeping the same position of both sleeve and cotter-B with respect to both H.P. and V.P.:
(i) SLEEVE
(a) Front view lower half in section
(b) Left side view
(ii) COTTER-B
(a) Front view
(b) Left side view
Print the title and scale used. Draw the projection symbol. Give 6 important dimensions.

Fig. 1 shows the details of the parts of a TURN-BUCKLE. Assemble all these parts correctly and then draw to scale 1 : 1 its following views. Keep 54 mm threaded portion of each rod inside the body of turn-buckle.
(i) Front view upper half in section
(ii) Right side view

If a label with “USE & CARE” instructions is to be pasted on the entire outer circumference of the bottom cylindrical portion, then the surface area of the label to be used will be __________.
(Hint : Lateral surface area of cylinder = $2\pi rh$)
 

The complete circle of $\phi d$ and the incomplete circle of $\phi 0.8d$ in the top view of a vertical grub screw with diameter ‘d’ are drawn to __________
 

The front view of a vertical grub screw is represented by which of the following views?

Why grub screws are used to hold sleeve on a shaft?
Grub screws are also known as
The total height in true scale, of the fire-extinguisher excluding the top valve assembly is